The Werewolf - S1-E5
Revealing mistake: It is obviously a dummy in a woman's dress The Werewolf throws into the empty swimming pool.
Revealing mistake: Torrance Beck and his men load Rockford on the car to dispose of him. They get ambushed, with 2 cars suddenly turning 90° blocking the road. Unexpected? Perhaps, but look at the asphalt; apparently it's a regular thing in that part of the road. There are already skidmarks reproducing the exact same movement. (00:33:30)
Revealing mistake: When Major Popov aims the rocket launcher at the Venus probe, there is no rocket in the launcher- it is just an empty tube.